Updated README with some notes on SDL

README

@@ -59,4 +59,38 @@ give it a far bigger deadzone then needed, thus reducing your ability
 for fine movements.
 
 
+[[ SDL Notes ]]
+===============
+
+Depending on what version and what compilation flags where used, your
+version of SDL might not use the joystick interface at all, but
+instead use the /dev/input/event* device directly. That means that any
+calibration or button/axis mapping will be ignored, as those apply to
+the joystick interface, not evdev.
+
+To work around that you have to set an environment variable that
+forces SDL to use the joystick device:
+
+ $ SDL_JOYSTICK_DEVICE="/dev/input/js0"
+ $ export SDL_JOYSTICK_DEVICE
+
+When you need two or more joysticks this will not work and you might
+need to recompile SDL and disable the evdev support.
+
+More info can be found at:
+
+ * ftp://ptah.lnf.kth.se/pub/misc/sdl-env-vars
+
+SDL_LINUX_JOYSTICK
+	Special joystick configuration string for linux. The format is
+	"name numaxes numhats numballs"
+	where name is the name string of the joystick (possibly in single
+	quotes), and the rest are the number of axes, hats and balls
+	respectively.
+
+SDL_JOYSTICK_DEVICE
+	Joystick device to use in the linux joystick driver, in addition
+	to the usual: /dev/js*, /dev/input/event*, /dev/input/js*
+
+
 # EOF #

TODO

@@ -13,14 +13,14 @@ git push --tags
 [[ TODO ]]
 ==========
 
-- A simple authomatic calibration method
-- Possibility of activate noise reduction in joystick axis
-- Load and save presets in devices, and to load them automatically
-when you connect the device.
+* [FEATURE] A simple authomatic calibration method
 
-* Watch teh syste, maybe bein in systray, to protect the device from
-  accidental reconfiguration by another application. [unlikely, as
-  that would mean polling]
+* [FEATURE] Possibility of activate noise reduction in joystick axis
+  (read only field, but can't hurd to have it, in case any app wants
+  to play with it)
+
+* [FEATURE] Load and save presets in devices, and to load them automatically
+  when you connect the device.
 
 * [CLEANUP] sync evtest_helper.?pp, make sure no boost dependency is
   present
@@ -43,6 +43,11 @@ when you connect the device.
 [[ Possible Future Improvments ]]
 =================================
 
+* [FEATURE] Watch teh system, maybe being in systray, to protect the
+  device from accidental reconfiguration by another
+  application. (unlikely, as that would mean polling and other then
+  jscalibrator there isn't much to mess up joystick calibration)
+
 * draw calibration icon
 
 * draw mapping icon